Browsing by Author "201-0014996"
Now showing items 1-20 of 21
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Valdebenito, Carolina; Garland, María Teresa; Quijada Abarca, Juan; Rojas, Rene S. (2009)The reaction of (2,6-diisopropyl-phenyl)-acetimidoyl chloride or (2,6-dimethyl-phenyl)-acetimidoyl chloride with 2,6-dimethylaniline in the presence of triethylamine yields a mixture of isomers N′-(2,6-diisopropyl-phenyl ...
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Yazdani-Pedram Zobeiri, Mehrdad; Vega, H.; Retuert de la Torre, Pedro Jaime; Quijada Abarca, Juan (SOC PLASTICS ENG INC, 2003-04)New types of compatibilizers based on functionalized polypropylene (PP) were synthesized by radical melt grafting either with monomethyl itaconate or dimethyl itaconate. The effect of these new modified PP compounds were ...
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López Manchado, Miguel; Kenny, J. M.; Quijada Abarca, Juan; Yazdani-Pedram Zobeiri, Mehrdad (WILEY-V C H VERLAG GMBH, 2001-07-06)
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López Manchado, Miguel; Yazdani-Pedram Zobeiri, Mehrdad; Retuert de la Torre, Pedro Jaime; Quijada Abarca, Juan (JOHN WILEY & SONS INC, 2003-08-22)To improve the compatibility and properties of blends based on high-density polyethylene (HDPE) and the ethylene-propylene copolymer (EPR), the functionalization of both through grafting with an itaconic acid derivative, ...
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Toro, P.; Quijada Abarca, Juan; Yazdani-Pedram Zobeiri, Mehrdad; Arias, José Luis (ELSEVIER SCIENCE BV, 2007-09)Chicken eggshell (ES) is an industrial byproduct containing 95% calcium carbonate, and its disposal constitutes a serious environmental hazard. Different proportions of chicken eggshell as bio-filler for polypropylene (PP) ...
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Yazdani-Pedram Zobeiri, Mehrdad; Vega, Héctor; Quijada Abarca, Juan (Wiley-VCH Verlag, 1996)Grafting of polypropylene was carried out in both boiling xylene and decalin as solvent medium with itaconic acid (2-methylenesuccinic acid) as functional polar monomer using 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane ...
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Yazdani-Pedram Zobeiri, Mehrdad; Calderón del Río, Katia Romina; Quijada Abarca, Juan (SOCIEDAD CHILENA DE QUIMICA, 2000-06)Polypropylene (PP) was functionalized in solution by grafting with monomethyl itaconate (MMI) by using xylene and decalin as solvents and 2,5-dimethyl-2,5-bis(tert-buthylperoxy)hexane (Lup. 101) as radical initiator. The ...
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Retuert de la Torre, Pedro Jaime; Martínez, Y.; Quijada Abarca, Juan; Yazdani-Pedram Zobeiri, Mehrdad (ELSEVIER SCIENCE BV, 2004-11-01)The formation of polymeric hybrid materials of siloxanes with gelatin (GE) starting from sodium metasilicate as the silica source, and their transformation into silica under different conditions have been studied. ...
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Toro, P.; Quijada Abarca, Juan; Peralta, Ronald; Yazdani-Pedram Zobeiri, Mehrdad (JOHN WILEY & SONS INC, 2007-02-15)The purpose of this work was to study how mineral fillers would behave in a polypropylene (PP) matrix when PP modified with maleic anhydride (MA) and/or itaconic acid (IA) was used as a coupling agent in the preparation ...
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Yazdani-Pedram Zobeiri, Mehrdad; Menzel, Cristian; Toro, Patricio; Quijada Abarca, Juan; May-Pat, Alejandro; Avilés, Francis (2013)Multi-walled carbon nanotubes (CNTs) are functionalized with itaconic acid (IA) and its derivative, monomethylitaconate (MMI), to prepare CNT/isotactic polypropylene (PP) composites. To promote dispersion and improved ...
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Bruna, J.; Yazdani-Pedram Zobeiri, Mehrdad; Quijada Abarca, Juan; Valentín, J. L.; López Manchado, Miguel (ELSEVIER SCI LTD, 2001-05)Polypropylene (pp) was functionalized in the melt phase by grafting with itaconic acid derivatives. 2,5-dimethyl-2,5-bis(tert-buthyl-peroxy) hexane (lupersol 101) was used as radical initiator. A Brabender Plasticorder was ...
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Bruna, J.; Yazdani-Pedram Zobeiri, Mehrdad; Quijada Abarca, Juan; Valentín, J. L.; López Manchado, Miguel (ELSEVIER SCIENCE BV, 2005-09)An ethylene-propylene copolymer (EPR) was functionalized in the melt by grafting with itaconic acid and its mono- and di-methyl esters by using dicumyl peroxide as radical initiator. Grafting reactions were carried out in ...
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Retuert de la Torre, Pedro Jaime; Quijada Abarca, Juan; Arias, V.; Yazdani-Pedram Zobeiri, Mehrdad (MATERIALS RESEARCH SOCIETY, 2003-02)In this paper, we report the preparation by the sol-gel technique of organic-inorganic hybrid composites containing the biopolymer chitosan incorporated in a siloxane-based inorganic network. The hybrid xerogels were ...
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Toro, P.; Quijada Abarca, Juan; Murillo, O.; Yazdani-Pedram Zobeiri, Mehrdad (JOHN WILEY & SONS LTD, 2005-04)The mechanical, morphological behavior and water absorption characteristics of polypropylene (PP) and silica, or PP and rice-husk, composites have been studied. The silica used in this study as filler was a commercial type ...
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Quijada Abarca, Juan; Dupont, Jairton; Silveira, Dione Corrêa; Miranda, Márcia S.Lacerda; Scipioni, Rosângela B. (1995)This work reports a comparative study of the catalytic behaviour for a series of metallocenes derived from Ti, Zr, Hf and Nb, which after activation with methylaluminoxane can polymerize ethylene. Results show that the Zr ...
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Maldonado Magnere, Santiago; Yazdani Pedram, Mehrdad; Aguilar Bolados, Héctor; Quijada Abarca, Juan (MDPI, 2021)This work consists of studying the influence of two thermally reduced graphene oxides (TRGOs), containing oxygen levels of 15.8% and 8.9%, as fillers on the barrier properties of thermoplastic polyurethane (TPU) nanocomposites ...
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Domínguez Barceló, Ana María; Quijada Abarca, Juan; Yazdani-Pedram Zobeiri, Mehrdad (WILEY-V C H VERLAG GMBH, 2006-08-07)Functionalized metallocene copolymers synthesized from ethylene with 5-hexen-1-ol and ethylene with 10-undecen-1-ol were used as compatibilizers in LDPE/starch and LDPE/dextran blends in order to improve the interfacial ...
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Yazdani-Pedram Zobeiri, Mehrdad; Quijada Abarca, Juan; López Manchado, Miguel (WILEY-V C H VERLAG GMBH, 2003-11-24)The use of grafted poly(propylene) (PP) and a random copolymer of ethylene and propylene (EPR) with an itaconic acid derivative, monomethyl itaconate (MMI), as compatibilizer for PP/EPR blends was analyzed. The grafting ...
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Moncada Acevedo, Edwin; Quijada Abarca, Juan; Lieberwirth, Ingo; Yazdani-Pedram Zobeiri, Mehrdad (WILEY-V C H VERLAG GMBH, 2006-08-02)Functionalized PP samples with different percentages of grafted IA, i.e., 0.7, 1 or 1.8 wt.-%, with similar molecular weights were used as compatibilizers in PP/clay nanocomposites. PP nanocomposites containing 1 wt.-% of ...
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Equiza, Nilton; Yave, W.; Quijada Abarca, Juan; Yazdani-Pedram Zobeiri, Mehrdad (WILEY-V C H VERLAG GMBH, 2007-09-14)Recycling of thermoplastic wastes consisting using SEBS/EPR and SBR/EPR as compatibilizers. The effect of PE/PP/PS/HIPS blends was investigated by The effect of the binary compatibilizer systems and processing conditions ...